package com.candy.security.jwt.filter;

import com.candy.security.jwt.entity.LoginUser;
import com.candy.security.jwt.service.AuthenticationService;
import com.candy.security.jwt.service.TokenService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.security.web.authentication.WebAuthenticationDetailsSource;
import org.springframework.stereotype.Component;
import org.springframework.web.filter.OncePerRequestFilter;

import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * token过滤器 验证token有效性
 */
@Slf4j
@Component
public class JwtAuthenticationTokenFilter extends OncePerRequestFilter
{
    @Autowired
    private TokenService tokenService;

    @Override
    protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain chain) throws IOException, ServletException
    {
        LoginUser loginUser = tokenService.getLoginUser(request);
        if (loginUser != null && SecurityContextHolder.getContext()
                                                      .getAuthentication() == null)
        {
            tokenService.verifyToken(loginUser);
            UsernamePasswordAuthenticationToken authenticationToken = new UsernamePasswordAuthenticationToken(loginUser, null, AuthenticationService.getAuthorities(loginUser.getAuthorities()));
            authenticationToken.setDetails(new WebAuthenticationDetailsSource().buildDetails(request));
            SecurityContextHolder.getContext()
                                 .setAuthentication(authenticationToken);
        }
        chain.doFilter(request, response);
    }
}
